Signal recovery circuit, electronic device, and signal recovery method

An electronic device comprising:

• a signal recovery circuit that recovers a clock from received input data, and incorporates the input data by the recovered clock,
• wherein the signal recovery circuit includes
• an oscillator that generates a first clock of which a frequency is variable, and
• a feedback circuit that controls the oscillator to synchronize the first clock with input data, depending on a phase relationship between the input data and the first clock, the feedback circuit including
• a control portion that controls the oscillator depending on the phase relationship between the input data and the first clock,
• a first phase detection circuit that generates a clock phase control signal depending on the phase relationship between the input data and the first clock,
• an output data generation circuit that generates output data by latching the input data at a change edge of the first clock, and
• a lock detection circuit that outputs a lock detection signal indicating whether a state is a lock state or a non-lock state, based on a comparison result of the input data and the output data.

A signal recovery method which recovers a clock from received input data, the method comprising:

• generating a first clock of which a frequency is variable;
• generating a clock phase control signal depending on the phase relationship between the input data and the first clock;
• generating output data by latching the input data at a change edge of the first clock;
• detecting whether a state is a lock state or a non-lock state, based on a comparison result of the input data and the output data;
• and
• performing a feedback control that controls the frequency of the first clock to synchronize the first clock with the input data, depending on the clock phase control signal.